Streaming time series data to detect fraud?
Elasticsearch with X-pack is a tool that would come in handy. The suite has an visualization engine, Kibana and logstash that collect, parse and transform the data telemetry.

https://www.elastic.co/products/x-pack/machine-learning

Modeling can take a while to learn, luckily there are tools like Elasticsearch that can help. 

Grafana also has tools but does not have a specific AI engine to it.But has a lot of integration with third party fraud detection tools.

https://grafana.com/

Sridhar